Automatic impression tbippeb for printing presses



W. C. CHESBRO AUTOMATIC IMPRESSION TRIPPER FOR PRINTING PRESSES Filed May 14 1921' 6 Shee ts-Sheet 1 INVENTOR %%@4W 9 fifmmi A TTORNE Y IAN ,946

w. c. CHESBRO AUTOMATIC IMPRESSION TRIPPER FOR PRINTING PRESSES Filed May 14 1921 6 Sheets-Sheet 2 INVENTIJRQ ATTHNEY- @Ct 23, 1923. I 11,433,946 w. c. CHESBRO AUTOMATIC IMPRESSION TRI PPER FOR PRINTING PRESSES Filed May 14, 1921 6 Sheets-Sheet 5 INVENTOR 20 ifi/jww' TTORNEV wv c. CHESBRO AUTOMATIC IMPRESSION TRIPPER FOR PRINTING PRESSES Filed May 14, 1921 6 Sheets-Sheet 4 INVENTOR ATTOREY mums 6 Sheets- Sheet 5 IN VENTOR H N m T T A Q 6 .5. H 5 4 1 J Q\\\\\\\ \\\\\\\\\\\\\\R Qit. 23, 1923 W. C- CHESBRO AUTOMATIC IMPRESSION TRIPPER FOR PRINTING PRESSES Filed May 14, 1921 11,473,946 v w. c. CHESBRO AUTOMATIC IMPRESSION TRIPPER FOR PRINTING PRESS ES' Filed May 14, 1921 6 Sheets-Sheet 6 m. 5. 8 2 m 3 5.? I

Patented Get. 23, 1923.

ease arres rarest VEFFEQ.

WILLIAM C. CHESBBO, OF ST. JOSEPH, MISSOURI.

AUTOMATIC IMPRESSION TBIPPEB FOR PRINTING PRESSES.

Application filed May 14.,

To all whom it may concern:

Be it known that 1, WILLIAM C. Cnnsnno, a citizen of the United States, residing at St. Joseph, in the county of Buchanan and State of Missouri, have invented certain new and useful Improvements in Automatic 1m pression Trippers for Printing Presses of which the following is a. specification, reference being had'therein to the accompanying drawing.

My invention relates to improvements in that class of impression trippers which are used for tripping and thereby removing the form a. predetermined distance from the platen; for preventing the printing of a sheet of paper laid on said platen; and the objects of my improvements are, first; to provide a. mechanism of this class, which. shall be used as a detachable attachment, which can readily and easily be secured on presses now generally in use, by an inexperienced person, and which can be done without altering or in any way changing the press, second; to provide a simple, substantial and durable attachment of this class i which shall automatically trip the impression 1 sheet from being out of proper position and also preventing the printing from being applied to any part of the tymp'an sheet, third; to provide manually operated electric circuit controlling means whereby the controlling circuit can be closed whiledistributing ink and can be opened when it is desired to print an impression on the upper one of said tympan sheets, for use in making ready as. it is termed, fourth; to so construct the impression tripper, that it shall be cheap in cost of manufacture and can be packed in the minimum amount of space, for storage or shipment.

'I attain these objects by the mechanism illustrated in the accompanying drawings, in which:

Figure 1 is a longitudinal section of the impression tripper and of a. printing press cut on the dot and dash line 1 1, seen in Fig. 2, showing the parts of the tripper out of operative position. Fig. 2 is a rear view of the tripping parts of the mechanism, seen in Fig. 1, certain parts of the printing press being broken away. Fig. 3 is aside view of the tripping part of the mechanism 1921. Serial No. 469,467.

and o'lfa press, looking toward the-right side of the press, certain parts of which are broken. away.

Fig. 4 is an enlarged section of the tripping mechanism, similar to Fig. 1, showing the parts of the tripper in position, with an impression tripped thereby; Fig. 5 is a top plan in detail of the trip-ping mechanism. Fig. 6 a topview of the automatically operated circuit closer in closed position. Fig. 7 is a. view similar to Fig. 6, showing the parts of the automatic circuit closer in open position, a certain portion of the platen being broken away. Fig. 8 is a slightly enlarged top view of the-platen and of the circuit closers carried thereby. Fig. 9 is anenlarged section in detail of a. portion of one of the grippersand of the two gripper electrodes carried thereon, cut vertically on the line 2 2, seen in Fig. 8, looking toward the left.

- Fig. 10 is an enlarged section in detail of one of they tympan electrodes, cut vertically on the line 3 3, seen in Fig. 8, looking toward the left. Figure 11 is an enlarged top View of one of the gripper electrodes showing its securing means in detail. Fig. 12 is a section in detail, of the parts seen in Fig. 11, cut vertically on the line 4 4, looking toward the rear. Fig. 13 is a side view, enlarged, of the automatically operated circuit closer, seen in Figs. 6 and 7.

My inventioncomprises the channel bar 5, which bar is secured by the U bolts 6 (see Fig. 5,) on the legs 7 of the bed'S of the press, as seen in Fig. 1. T he lower end portions of said legs are provided with the tie-bar 9, formed therewith.

The upper ends of the space legs 10 are se cure-d on the lower surface of said channel bar. The lower ends of said space legs rest upon said tie-bar, for determining the height at which said channel bar is secured on the bed legs 7 The plate 11 is. secured on the upper surface of said channel bar. The iron bound electro-magnet 12 is secured on said plate. The helical exciting coil 13 is placed in said magnet; The armature 14 is secured on the 'icentral portion of the rod 15, which is mounted for slidable movement through said magnet 12. The gong hammer 16 is loosely nounted on the upper: end of said rod. The gong 17 is secured on the upper end of the post 18, the'lower end of which is secured in the plate 11.

The lower end of the rod is passed loosely through an opening formed through the drive-bar 19, which is oscillatably mounted on the channel bar 5. Said rod is provided with the pin'QO, which is secured in its lower end and extends beyond the sides of said rod, for lifting the free end portion of said drive bar, which latter portionis dapted to gravitate from the position seen in Fig. i, to theposition seen in Fig-.1.

The engaging; hook Qljis formed on the drive'bar l9 and is lifted by said .bar

until itszpath of travel, is in alinement with the lug 22, by the hereinbefore described electro-magnetic lifting means, after. which movement toward the left, of the bed legs 7, '(by the described connecting p-arts,) moves said hook into engagement with said lug; I

Said lug 22 is secured on the gear carrier 28. The upper end of said gearcarrier is oscillatably mounted on theshaft 24,the "ends of which are oscillat-ably mounted in the frame sides. of the press. The internal gear segment 25 issecured on one side of the lower end portion of said gear carrier.

The. pinion segment 26 is detachably secured on the shaft 27, by the triangularly formed key 26,'one corner of which key ispressed into said shaft by tightening the cap 26". i

; Thezends of said shaft 27 are oscillatably mounted in said frame sides.

-shape, for contact alternately with the shaft.

The central portion of the throw-off pin circle 28 issecured on the shaft 27. The extremities of said pin circle are of hook 2 1, for limiting its oscillation and the therewith connected shaft 27. j V

The stud 29 is secured in the central portion of said pin circle 28 and extends there" from into the indicated channel 30, which is formed in the adjacent face of the L shaped throw-off piece 31. i

The lower end of the connecting rod 32 is oscillatably connected with unchanneled end ofsaid throw-off piece. -The upper end of said connecting rod iscrank connected withthe back shaft 33, the end portions of which are oscillatably mounted in the flanges V which are formed on the bed 8.

The journals 34 (of which one is shown in Fig. 3,) are formedon the extremities of said back shaft, eccentric-ally thereto. Said journals, are rod and crank connected with .the crank disks'35 by the connecting rods 36. Said disks are secured'onthe ends of the main shaft 37, whicliis rotatable in the frame sides 'f, M I

Referring to Figs. 1 and 2, one side of the battery .38" is connected with the electric conductor 39which leads thence around one of the channeled portions of the spool 40,

which is loosely mounted on the .bed shaft ductor 42. The other side of said battery is connected with the adjacent frame side 7, by the conductor 4C3.

The other end of said'helical coil is C011 nected with the conductor 44 which leads the refrom'to the binding post 45.

Conductor 46 leads from said binding post around the otherchanneled portionof spool 40,- extends therefroinaround the, spool 46,

Said conductor extends-from said spool to the binding post 41, which is; connected with one end of the coil '13 by the con-.

(see Fig. 1,) thence to its connection 'with V the manually; operated circuit closer 47.

S-aidcircuit closeris connected by the con--.

ductor L8, withthe fixedelectrode 4i9,which is secured on the upperfront corner portion of'one of the framesides 7,"as seen in Fig. 13. The coac-ting electrode 50 is secured on the hereinafterdescribed rocker,

of the press, which carries said electrode into contact with the electrode 49..

The conductor 51 connects the electrode 50 with the insulated metal strip 52, at53. Said strip is secured on the under side of the strip of insulation 52. Said metal strip is connected by the screw 53 with the tympan electrode 5%, the rear end ;of which 1.5 secured on 'saidinsulation by the screw which is secured in any desired one of the apertures 53, for adjusting the position of saidtynipan electrode.

i The gripper electrodes 55 and 56 are slidable on the gripper 57, the rear end of which is laterally adjusted and secured on the'gripper bar 58. =The gripper electrode 59 is similarly mounted onthe gripper'GO, which latter is similarly secured on said gripper oar. r

The bearing brackets Gland 62 are secured respectively, on the rear corners of the is secured on its respective gripper, by an eccentrically mounted cam 66, which is oscillated against the metal strip 67. for pressing the latter against ts respective gripper. Said cam is manually moved by its thumb lever 66. Said electrodes are adjusted and thus secured-in proper position to coordinate with the various proportions of sheets of paper to bep-rinted.

Theplaten 63 is provided VltlllihGTTOllll and rear bails 68 for holding the tympan sheets tightly and smoothly stretched on said platen, as hereinafter described.

The ends of the strip of insulation 52 are respectively secured on the intermediate portions of the brackets 61 and 62.

Platen 63 is adjustably secured on the platen rocker 69, which latter is secured on the rocker shaft 70, the ends of which shaft are oscillatably mounted in the frame sides 7". Said rocker is oscillated by a cam and friction roll, which form no part of this invention, and'are therefore neither shown nor described.

The locking arm 71 is formed with and depends from the rocker 69. The lug 72 is formed on the free. end of said arm. By the previously mentioned rocker oscillating means, said rocker is oscillated clockwise, until the lug 72is thereby carried against the frame projection 72', over the free end of the oseillatably mounted lock bar 7 3, after which the upper endof said lock bar is.

oscillated into position, beneath said lug, by the spring 74, for locking said rocker and the therewith connected part-s, against movement, while taking an impression. The free end of said lock bar is. moved outward by the cam 75, (of which but a part is shown in'Fig. 1,) the surface of which cam is retated past'the friction roll 76.

The gripper bar 58 with the thereon secured grippers 57 and 60, is yieldably held in the position seen in Fig. 1, by the spring 77, one. end of which is secured to the gripper-bar arm 78 and the other end secured to the gripper cam 79, with the friction roll 80 therebyheld against the face of said cam. The slot 81 is formed through the lower end portion of said cam, through which the friction roll 82 extends, for guiding the lower end of said cam. Said friction roll .82 is rot-atably mounted on the adjacent frame side 7". The upper end of said cam is oscillatably connected with the adjacent end of the platen 63.

Inthe tripping mechanism, the. recover bar 86 is provided with the adjusting screw 87 which is screwed through a threaded aperture, formed through the bent free end of said bar.

The other end of said recover bar is oscillatably connected with the gear carrier 23.

Said recover bar 86 is moved toward the right by the return movement of the bed legs 7, for recovering the hereinbefore described movement of the tripping mechanism.

In the operation of my invention, a form of type or the. like (not shown,) is secured on the bed 8 of the press, aplurality of tympan sheets 83 are secured upon the platen 63, by the bails 68, after which the manually operated switch 47 is opened.

Power is then applied for rotating the drive shaft 85, which by unshown gears drives the press. The previously mentioned Said pressman then makes incisions through, the upper one of said tympan' sheets, in which incisions the extremities of the tympan electrode 54 are inserted, as seen in Fig. 10.

Said pressman then adjusts the grippers 57 and 60 for holding the sheet of paper to be printed, after which he so adjusts the gripper electrodes that their lower edges 59 (see Fig; 12,) rest uponthe tympan electrodes 54. He then'releases' said grippers and places a sheet of'paper to be printed, upon the upper, printed one of the tympan sheets 83, after which he closes the switch 47 and applies power to the drive shaft 85, for again operating the press.

Should either the rear or the left edge, or both of said edges of said sheet of paper be not placed against said gauges, the thus exposed tympan electrode would be contacted by the corresponding gripper electrode, thereby closing therethrough the previously described electric circuit, upon which the following described impression tripping actions take place.

Electric energy passes from the battery 38, (see Fig. 5,) through the conductor 39, the binding post 41, into the magnet coil 13, (see Fig. 1,) thence through conductor 44, the binding post 45, the conductor 46, the manuallyoperated switch 47, thence through the conductor 48, the electrodes 49 and 50, the conductor 51, (see Fig. 6,) the insulated metal strip 52, (see Fig. 10.) thence through the screw 53, into the tympan electrode 54, thence through the gripperelectrode 59, (see Fig. 8,) through the gripper 60, the gripper'bar 58, the bearing brackets 61 and 62, the platen 63, (see Fig. 1,) the platen rocker 69 and the rocker shaft 7 0, into and through the frame side 7" and thence through conductor 43 to theot-her side of the battery 38, thereby energizing the magnet 12, seen in Fig. 1.

The thus energized magnet draws the armature 14 from the posit-ion seen in Fig. 1, to the position seen in Fig. 4, thereby suddenly lifting the therewith connected rod- 15, which similarly lifts the gong hammer 16. The inertia of said hammer lifts it against the gong 17, after which it gravitates to the position shown in Fig. 4, resting upon the upper end of said rod, thereby giving warning thatthe sheet to that the thereon eccentric be printed is in an in proper position. "l

Saidrod lifts the pin-2O against the drive rod 19, therebylitting the hook 21, until its book stop 21" is against the lug 22,-with the lineio'f travel of said lug. r V f I In the operation of the press, the move said hook ina-alinement with 'ment toward the. left -oi the legs 7, which similarly move the channel bar. 5, thereby moves the drivelrod 19 from. the position seen in Fig. 1, to the position seen in Fig. at.

This moves the therewith connected gear carrier and the'gear segment 25, thereby ro--- eating the pinionsegment 26 clockwise, thereby similarly rotating the shaft 27. This movement of said shaft, similarly oscillates the pin circle 28, which similar-1* moves the pin 29.

The engageinent of said pin 29 with the channel 30; which is formed in the adjacent face of the throw-ofl'piece 31, oscillates the latter counter-clockwise, thereby moving the connecting rod 32 upward, from the position seen in Fig. 1, to the position seen in Fig. l. his movement oscillates the crank connected back shaft 33 clockwise, from the position seen in Fig. 8, to such' position journals move said back shaft and the therewith connected bed 8 from the platen 63,'thereby moving the before mentioned form such distance from said platen, that the thereon secured tympan sheets 83' and said'misplaced sheet of paper receive no impression from said form.

The pres v feeder at this juncture hears the previously described sound of the gong 17 after which he properly places said sheet or" paper against the gauges 84, seen in Fig; 8.

The bar 86 (see Fig. 1,) recovers the previously described movement of the gear carrier 23, which recover movement is actuated by return movementof the bed'legs 7'.

After this recover movement has taken place, "further operation of the pressprints said properly placed sheet oi paper, during which operation the tripping mechanism is I what I claim as new, and desire'to secure by being adjustably secured'on the rippers of said press; and moving means formed/of partsof said press whereby said electrodes are moved for bring-ingsaid gripper elec trodes into contact with said tymp'anfelectrodes r 2. The combination with the'backshaftof 'a printing press said shaft being provided with a crank secured thereon-and with a journal formed. eccentrically thereto on each one of its ends and oscillatably mounted befdlegs by which said back shaft is carried; or oscillating means whereby said legs are oscillated; aconnecting mod the upper end of which isconnected-with said crank; a-trip shaft; rod moving means loosely mounted on said'trip shaft, the upper end 01 said rod moving means beingpivotally connected With the lower end of said connecting rod for moving the" latter longitudinally; a pin circle Secured] on said trip shaft; astud securedin the central' portion of said pin circle, said stud being QXeQDClQCl therefrom intoljengagement with a channel :iormed 'in the -adja'cent face of said rod moving segment detachably secured on said; trip means; a pinion shaft; an oscillatably mounted gear carrier;

an internal gear segment secured. onsthe tree end portion of'saidqgear' carrier said gear segment being, in engagementwith said pinion segment; alug secured on said gear.

irtll'lel"; mounting means secured on said bed legs; a d 'ive bar one'end portion'ofWhic-h is oscillatably mounted on said mounting means; a hook formed on the freefendportion of said drive her said hook-being adapted to normally pass beneath said lug; electro-magnetie lifting means whereby the free end portion of said bar is lifted to such position that the line-of travel of the there-' with formed hook is in alinement withgsaid lug; moving means whereby said bar-"and the thereon formed hook ai'e moved for moving the latteragainst said lug thereby .moving said gear carrier in one direction; gears carrier returning means actuated by movement of said bed legs for returning the movement of said gear carrier an energi d electric circuit for energizing said-lifting means; and automatically operated circuit controlling" means for controlling"saidfeled trio circuit. 5

In an automatic impression tripping mechanism; a source of electric energy;';fa circuit for directing said electric energy;- a-n electromagnet in said circuit; an armature for said magnet; a slidablymounted red on which said armature is secured; a driv'ebar for driving'said tripping mechanism; and lifting means on the'lower end of said rod whereby said bar is lifted into operative 7 position for operating said tripping 'mech' amsm.

a. In a device of the class des'crib'ed, the

iso

combination of a printing press including a supporting frame, a form support, a platen arrangement oscillatively mounted in said support frame, an adjustable gripper arrangement cooperating with said platen arrangement, electric circuit means, a trip mechanism for operation upon closing of the circuit to hold said platen arrangement and form out of impression taking relation, adjustable electrodes carried by the platen arrangement, adjustable electrodes carried by said gripper arrangement, said platen electrodes and gripper electrodes cooperating with sheets placed upon the platen to provide an automatic control means for operation in electric circuit.

5. In a device of the class described, the combination of a printing press including a supporting frame, a form support, a platen arrangement movably mounted in said supporting frame, an adjustable gripper arrangement in cooperation with said platen arrangement including a bar member pivotally mounted with respect to said platen, and gripper arms extending therefrom over the platen and being slidable laterally of the platen, electrode members adjustable longitudinally of said gripper arms, an insulated bar carried by said platen arrangement, a conductor bar carried below said insulated bar, electrode members carried by said insulated bar and conductor bar of the platen arrangement being laterally adjustable over the platen thereon, electric circuit means, a trip mechanism for opera tion upon closing of the circuit by means of said electrodes to hold said platen arrangement and form out of impression engaging relation, said platen electrodes and gripping arm electrodes cooperating with sheets placed upon the platen to provide an automatic control means for said electric circuit.

6. In a tripping mechanism for printing presses the combination with a press including a stationary frame portion, a platen arrangement, legs pivotally supported by said stationary frame, a form, and a shaft eccentrically supported by said legs and having said form mounted thereon, of a shaft carried by said frame, an arm supported on the last mentioned shaft having a gear segment carried thereon adjacent the free end thereof, a second shaft supported by said frame, a pinion on said second shaft in meshing relation with the gear segment of said arm, lever means connectin said pinion shaft with the eccentrically mounted form carrying shaft, and means for operat ing said arm whereby said form may be tripped out of operating relation to said platen. arrangement.

7. In a tripping mechanism for printing presses, the combination with a press including a stationary frame portion, a platen arrangement, legs pivotally sup-ported by said frame, a form, and a shaft eccentrically supported by said legs and having said form mounted thereon, of a shaft carried by said frame, an arm supported on the last mentioned shaft having a segmental gear thereon adjacent its free end, a second shaft supported by said frame, a pinion on said second shaft in meshing relation with the segmental gear, lever means connecting said pinion shaft with the eccentrically mounted form carrying shaft to operate the latter for tripping said form upon movement of said segmental arm, an electric circuit embodying a circuit maker and breaker arrangement on said platen arrangement, an elcctromaguet carried by said-legs in said electric circuit, an armature for said electromagnet, a drive bar pivotally carried by said legs adapted for movement upon movement of said electromagnet armature, said drive bar when the circuit is closed adapted to be moved into operating relation with the arm upon which said gear segment is mounted so that when the legs of said printing press move to an impression taking relation said drive bar will move said arm to trip the form out of operative relation with the platen arrangement, and a recovery bar pivotally carried by said arm adapted to engage a part of the pivotally mounted legs when the latter are moving away from said frame to right the position of the form.

In testimony whereof I ailiX my signature.

WILLIAM C. CHESBRO. 

